22212231220 has 36 divisors (see below), whose sum is σ = 47293647660. Its totient is φ = 8763139584.

The previous prime is 22212231193. The next prime is 22212231241. The reversal of 22212231220 is 2213221222.

It can be written as a sum of positive squares in 6 ways, for example, as 857669796 + 21354561424 = 29286^2 + 146132^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2376 + ... + 210784.

It is an arithmetic number, because the mean of its divisors is an integer number (1313712435).

Almost surely, 2^22212231220 is an apocalyptic number.

22212231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22212231220 is an abundant number, since it is smaller than the sum of its proper divisors (25081416440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22212231220 is a wasteful number, since it uses less digits than its factorization.

22212231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208564 (or 208489 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22212231220 its reverse (2213221222), we get a palindrome (24425452442).

It can be divided in two parts, 2221 and 2231220, that added together give a triangular number (2233441 = T₂₁₁₃).

The spelling of 22212231220 in words is "twenty-two billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty".